Plastic waterproof covering for roofs, &amp;c.



UNITED STATES PATENT" OFFICE;

BERNARD W- OCONNELL, 0F MINNEAPOLIS, AND DENNIS OCONN ELL, 0F GLEN LAKE,

MINNESOTA.

PLASTIC WATERPROOF COVERING FOR ROOFS, &c.

No Drawing.

To all whom it may concern.

Be it known that we, BERNARD W. OCoN- NELL and DENNIS OGoNNnLmcitizens of the United States, residing at Minneapolis and Glen Lake, respectively, in the county ofto be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertaing to make and use the same.

Our invention has for its object to provide a cheap, yet highly efiicient waterproof non crackable covering for roofs, walls, floors, and the like, and to such ends, generally Stated, the invention consists of the novel combination of materials hereinafter described and the novel process of commingling or assembling the same, also hereinafter described.

lVe have found that this highly efficient material for the purposes stated may be produced by using as the chief elements, hard or soft coal ashes, preferably the former, and

asphalt mixed with a small amount of oil, preferably a mineral oil, such as low grade kerosene.

The best results have been obtained by using the coal ashes and asphalt in approximately the proportions of four parts of the former with one part of the latter.

The process of producing the material is as follows:

The asphalt is heated to a fluid condition; the ashes are then stirred into the same; the commingled ashes and asphalt are then reheated so as to further heat both the ashes and the asphalt and thus insure the asphalt being in, such liquid form that it will be thoroughly absorbed by and commingled with the ashes.

The kerosene or mineral oil should be stirred into the mass while hot, or during the re-heating thereof, as above just stated, and during the said re-heating, the mass should be thoroughly stirred and commingled. Enough of the kerosene of mineral oil should be stirred into the mass, so that the mass, when hot and ready for application to the roof or other surface will be in the form of a soft slush capable of being easily Specification of Letters Patent.

Patented Mal-.8, 1921.

Application filed February 13, 1920. Serial No. 358,493.

' spread. After the material is ap lied to the roof, for example, and after it as cooled, but preferably before it has become cold, or to atmospherlc temperature, it is rolled out, or otherwise pressed to'a smooth surface formation.

For some time after it has been applied, the coating material will be quitesoft, but will maintain its form under all atmospheric temperatures as soon as it is cold and may then be walked upon'without damage. It Wlll gradually, and in the course of several weeks, become much harder, but will always be quite flexible, so that it will not crack, and moreover, will be absolutely waterproof. It 1s, therefore, anideal material for roof coverings, but is also serviceable for the other purposes indicated. When used as a floor covering, it should be made with a very small amount of kerosene or mineral oil mixed therewith, and a little experiement will enable users to determine just the amount of oil required for the different uses.

The chief ingredient being ashes, and such material being available in great uantities at little or no cost, it, of course, fol ows that the composition above described may be made at small cost. Actual usage of the material has demonstrated the efliciency thereof.

What we claim is:

1. A composition for covering roofs, floors, walls, etc., comprising approximately four parts of coal ashes to one part of asphalt, and a small amount of oil, the said ingredients being thoroughly commingled and the ashes being saturated with-the asphalt and oil. I

2. The process of making a covering for roofs, floors, walls, etc., which consists in heating asphalt to liquid form, in stirring coal ashes into the hot molten asphalt, in

then applying heat to the commingled mass 

